Chūō-Sōbu Line
JB
An E231-500 series EMU on the Chuo-Sobu Line in August 2022
Overview
Native name	中央・総武緩行線
Status	Operational
Owner	JR East
Locale	Tokyo,Chiba Prefecture
Termini	Mitaka Chiba
Stations	39
Color on map	Yellow (#ffd400)
Service
Type	Commuter rail
Depot(s)	Mitaka
Rolling stock	E231-0 series,E231-500 series,E231-800 series
Daily ridership	2,359,390 (2015)[1]
History
Opened	1 July 1932; 93 years ago (1 July 1932)
Technical
Line length	60.2 km (37.4 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DCoverhead catenary
Route map

TheChūō-Sōbu Line (Japanese:中央・総武緩行線,Hepburn:Chūō-Sōbu-kankō-sen) is a railway line that runs throughTokyo andChiba Prefecture, Japan. Part of theEast Japan Railway Company (JR East) network, the line operates on separate tracks along theright-of-way of theChūō Main Line (Chūō Line (Rapid)) andSōbu Main Line (Sōbu Line (Rapid)), providing service betweenMitaka Station in thecities ofMitaka andMusashino andChiba Station inChiba.

The termKankō (緩行,lit. "slow run") distinguishes local trains on the Chūō-Sōbu line from rapid service trains running on the Chūō Main Line between Mitaka andOchanomizu and on the Sōbu Main Line betweenKinshichō and Chiba.

• Regularly, trains terminate at Chiba or Tsudanuma at the east side, and terminate at Nakano or Mitaka at the west side
• All trains stop at every station.
  • For station information on the parallel rapid/express lines, see theChūō Line (Rapid) andSōbu Line (Rapid) articles.

All through service trains enter theTōzai Line at either Nakano, or Nishi-Funabashi. These trains operate within the following routes:

• Mitaka – Nakano – (Tōzai Line) – Nishi-Funabashi – Tsudanuma (weekday mornings/evenings only)
• Nakano – (Tōzai Line) – Nishi-Funabashi – Tsudanuma (weekday mornings/evenings only)
• Mitaka – Nakano – (Tōzai Line) – Nishi-Funabashi
• Mitaka – Nakano – (Tōzai Line) – Nishi-Funabashi – (Tōyō Rapid Railway Line) –Tōyō-Katsutadai (mornings/evenings only)

Prior to March 2024, seasonalLimited ExpressShinjuku Wakashio andShinjuku Sazanami trains stopped atAkihabara on the Chūō-Sōbu Line "mainly on weekends and holidays when service is heavy".^[2] As of March 2024^[update], these trains no longer stop atAkihabara.^[2]

At around 9 -10pm, a few westbound trains headed beyond Mitaka onto the Chūō Line (Rapid), with some terminating atMusashi-Koganei, and the others atTachikawa. The other trains during the hour operated regularly.

At around 4 - 6am and 11pm - 1am, Chūō-Sōbu Line services were divided atOchanomizu Station, into two sections.

• At the western section (Mitaka – Ochanomizu),Chūō Line (Rapid) trains ran through the Chūō-Sōbu Line tracks betweenNakano andOchanomizu, with services serving betweenTokyo and as far asTakao, or evenŌme, which stops at all stations.
• At the eastern section (Ochanomizu – Chiba), local trains operated and terminated at the two ends of the section.

This service pattern last operated on 13 March 2020. To prepare for the eventual installation of platform doors on Chūō-Sōbu Line platforms and the future addition of Green Cars on the Rapid line, Chūō Line Rapid service trains no longer regularly operate on the Chūō-Sōbu Line tracks.^[3]

Legend

• ●: All trains stop
• ■: Some trains pass
• ▲: All trains pass on weekends and holidays
• ｜: All trains pass

Official Line name	Station No.	Station	Japanese	Distance (km)			Local		Rapid		Transfers	Location
				Between stations	Total		Chūō-Sōbu Line	Tozai Line through	Chūō Line	Sōbu Line
Sōbu Main Line	JB39	Chiba	千葉	-	From Chiba 0.0	From Tokyo 39.2	●		↑ To Tokyo	●	■Uchibō Line ■Sotobō Line ■Narita Line ■Sōbu Main Line KSKeisei Chiba Line (Keisei Chiba: KS59) Chiba Urban Monorail Lines 1 and 2	Chūō-ku, Chiba	Chiba
	JB38	Nishi-Chiba	西千葉	1.4	1.4	37.8	●			｜
	JB37	Inage	稲毛	1.9	3.3	35.9	●			●		Inage-ku, Chiba
	JB36	Shin-Kemigawa	新検見川	2.7	6.0	33.2	●			｜		Hanamigawa-ku, Chiba
	JB35	Makuhari	幕張	1.6	7.6	31.6	●			｜	KSKeisei Chiba Line (Keisei Makuhari: KS53)
	JB34	Makuharihongō	幕張本郷	2.0	9.6	29.6	●			｜	KSKeisei Chiba Line (Keisei Makuharihongō: KS52)
	JB33	Tsudanuma	津田沼	2.9	12.5	26.7	●	●		●	KSKeisei Matsudo Line (Shin-Tsudanuma: KS66)	Narashino
	JB32	Higashi-Funabashi	東船橋	1.7	14.2	25.0	●	●		｜		Funabashi
	JB31	Funabashi	船橋	1.8	16.0	23.2	●	●		●	TDTobu Urban Park Line (TD35) KSKeisei Main Line (Keisei Funabashi: KS22)
	JB30	Nishi-Funabashi	西船橋	2.6	18.6	20.6	●	●		｜	JMMusashino Line (JM10) TRTōyō Rapid Railway Line (TR01) TTokyo Metro Tozai Line (T-23) (some trains through to Tsudanuma)
	JB29	Shimōsa-Nakayama	下総中山	1.6	20.2	19.0	●	Through to TTokyo Metro Tozai Line		｜
	JB28	Moto-Yawata	本八幡	1.6	21.8	17.4	●			｜	SToei Shinjuku Line (S-21)	Ichikawa
	JB27	Ichikawa	市川	2.0	23.8	15.4	●			●
	JB26	Koiwa	小岩	2.6	26.4	12.8	●			｜		Edogawa	Tokyo
	JB25	Shin-Koiwa	新小岩	2.8	29.2	10.0	●			●		Katsushika
	JB24	Hirai	平井	1.8	31.0	8.2	●			｜		Edogawa
	JB23	Kameido	亀戸	1.9	32.9	6.3	●			｜	TSTōbu Kameido Line (TS44)	Kōtō
	JB22	Kinshichō	錦糸町	1.5	34.4	4.8	●			●	JOSōbu Line (Rapid) (JO22) ZTokyo Metro Hanzomon Line (Z-13)	Sumida
Sōbu Main Line Branch						From Kinshichō 0.0
	JB21	Ryōgoku	両国	1.5	35.9	1.5	●			To Tokyo and JO Yokosuka Line ↓	EToei Ōedo Line (E-12)
	JB20	Asakusabashi	浅草橋	0.8	36.7	2.3	●				AToei Asakusa Line (A-16)	Taitō
	AKBJB19	Akihabara	秋葉原	1.1	37.8	3.4	●				JYYamanote Line (JY03) JKKeihin-Tōhoku Line (JK28) HTokyo Metro Hibiya Line (H-16) Tsukuba Express (01) SToei Shinjuku Line (Iwamotocho Station, S-08)	Chiyoda
	JB18	Ochanomizu	御茶ノ水	0.9	38.7	4.3	●		●		JCChūō Line (Rapid) (JC03) MTokyo Metro Marunouchi Line (M-20) CTokyo Metro Chiyoda Line (Shin-ochanomizu: C-12)
Chūō Main Line						From Tokyo 2.6
	JB17	Suidōbashi	水道橋	0.8	39.5	3.4	●		｜		IToei Mita Line (I-11)
	JB16	Iidabashi	飯田橋	1.1	40.6	4.5	●		｜		TTokyo Metro Tozai Line (T-06) YTokyo Metro Yurakucho Line (Y-13) NTokyo Metro Namboku Line (N-10) EToei Ōedo Line (E-06)
	JB15	Ichigaya	市ケ谷	1.3	41.9	5.8	●		｜		Y Tokyo Metro Yurakucho Line (Y-14) N Tokyo Metro Namboku Line (N-09) SToei Shinjuku Line (S-04)
	JB14	Yotsuya	四ツ谷	0.8	42.7	6.6	●		●		MTokyo Metro Marunouchi Line (M-12) N Tokyo Metro Namboku Line (N-08)	Shinjuku
	JB13	Shinanomachi	信濃町	1.3	44.0	7.9	●		｜
	JB12	Sendagaya	千駄ケ谷	0.7	44.7	8.6	●		｜		EToei Ōedo Line (Kokuritsu-kyogijo: E-25)	Shibuya
	JB11	Yoyogi	代々木	1.0	45.7	9.6	●		｜		JYYamanote Line (JY18) E Toei Ōedo Line (E-26)
Yamanote Line
	SJKJB10	Shinjuku	新宿	0.7	46.4	10.3	●		●		JY Yamanote Line (JY17) JASaikyō Line (JA11) JSShōnan-Shinjuku Line (JS20) Odakyū Odawara Line (OH01) Keiō Line,Keiō New Line (KO01) MTokyo Metro Marunouchi Line (M-08) SToei Shinjuku Line (S-01) E Toei Ōedo Line (E-27,Shinjuku-nishiguchi: E-01) Seibu Shinjuku Line (Seibu-Shinjuku: SS01)	Shinjuku
Chūō Main Line
	JB09	Ōkubo	大久保	1.4	47.8	11.7	●		｜		JY Yamanote Line (Shin-Ōkubo: JY16)
	JB08	Higashi-Nakano	東中野	1.1	48.9	12.8	●		｜		E Toei Ōedo Line (E-31)	Nakano
	JB07	Nakano	中野	1.9	50.8	14.7	●	●	■		TTokyo Metro Tozai Line (T-01) (some trains through to Mitaka)
	JB06	Kōenji	高円寺	1.4	52.2	16.1	●	●	▲			Suginami
	JB05	Asagaya	阿佐ケ谷	1.2	53.4	17.3	●	●	▲
	JB04	Ogikubo	荻窪	1.4	54.8	18.7	●	●	■		MTokyo Metro Marunouchi Line (M-01)
	JB03	Nishi-Ogikubo	西荻窪	1.9	56.7	20.6	●	●	▲
	JB02	Kichijōji	吉祥寺	1.9	58.6	22.5	●	●	■		Keiō Inokashira Line (IN17)	Musashino
	JB01	Mitaka	三鷹	1.6	60.2	24.1	●	●	■		JCChūō Line (JC12)	Mitaka

Trains used on the line are based at Mitaka Depot.

• E231-0 series 10-car EMUs (yellow stripe) (since February 2000)^[4]
• E231-500 series 10-car EMUs (yellow stripe) (since 1 December 2014)^[5]

Trains run between Mitaka and Tsudanuma (Chūō-Sōbu Line) or Toyo-Katsutadai (Toyo Rapid Line), all via the Tokyo Metro Tozai Line between Nakano and Nishi-Funabashi.

• E231-800 series 10-car EMUs (light blue and blue stripe) (Does not run on the Toyo Rapid Line)

• Tokyo Metro 05 series 10-car EMUs (light blue stripe)
• Tokyo Metro 07 series 10-car EMUs (light blue stripe)
• Tokyo Metro 15000 series 10-car EMUs (light blue stripe)

• 
  JR East E231-0 series
• 
  JR East E231-500 series
• 
  Tokyo Metro 05 series
• 
  Tokyo Metro 15000 series
• 
  Tokyo Metro 07 series
• 
  JR East E231-800 series

• 101 series EMUs (yellow livery) (from 1963 until November 1988)^[4]
• 103 series 10-car EMUs (yellow livery) (from 1979 until March 2001)^[4]
• 201 series 10-car EMUs (yellow livery) (from 1982 until November 2001)^[4]
• 205 series 10-car EMUs (yellow stripe) (from August 1989 until November 2001)^[4]
• 209-500 series 10-car EMUs (yellow stripe) (from December 1998 until 19 April 2019)^{[citation needed]}
• E231-900 series 10-car EMU (yellow stripe) (from 27 March 1999 as209-950 series, until 25 February 2020)^[6]

• 301 series 10-car EMUs (light blue stripe) (on Tozai Line inter-running services from 1966 until 2003)

• SeeChūō Line (Rapid)#Rolling stock for the train types which operated this service until 13 March 2020.

• 
  A Chūō-Sōbu Line 101 series EMU in August 1978
• 
  A Chūō-Sōbu Line 201 series EMU in May 2001
• 
  A Chūō-Sōbu Line 301 series EMU in February 2003
• 
  A Chūō-Sōbu Line 205 series EMU
• 
  A Chūō-Sōbu Line 209-500 series EMU in April 2009
• 
  The sole E231-900 series EMU in June 2019

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Women-only cars, designed to preventgropers, were introduced on this line during morning peak periods starting on 20 November 2006.

On 20 August 2016, station numbering was introduced to the Chuo-Sobu line with stations being assigned station numbers between JB01 and JB39.^[7][8] Numbers increase towards in the eastbound direction towards Chiba.

Wikimedia Commons has media related toChūō-Sōbu Line.

• Chūō-Sōbu Line (Japan Visitor)(in English)

• Railway lines in Tokyo
• Lines of East Japan Railway Company
• Railway lines in Chiba Prefecture
• 1067 mm gauge railways in Japan
• Railway lines opened in 1932
• 1932 establishments in Japan

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